20250121-deadline-sched-features

[douzzer]

prepare for release 1.6.3: update ChangeLog.md and doc/wolfSentry_refman.pdf.

update copyright year.

add wolfsentry_set_deadline_rel(), wolfsentry_get_deadline_rel(), and wolfsentry_get_deadline_rel_usecs();

add WOLFSENTRY_SUCCESS_ID_NO_DEADLINE and WOLFSENTRY_SUCCESS_ID_EXPIRED;

add wolfsentry.default_policy, mirroring wolfsentry->routes->default_policy, for lock-free access to default policy;

in wolfsentry_route_event_dispatch_1(), set *action_results to wolfsentry->default_policy before returning error code from failed lock op;

src/wolfsentry_util.c: add helper funcs usecs_to_wolfsentry_time() and wolfsentry_time_to_usecs(), and fix wolfsentry_set_deadline_rel_usecs() to properly convert from usecs to wolfsentry_time_t (which is usecs in built-in time, but can't be relied on);

in src/lwip/packet_filter_glue.c, pivot decision on action_results even on error returns from wolfsentry_route_event_dispatch_with_inited_result(), to honor the default action set upon lock failure (normally TIMED_OUT or BUSY).

add WOLFSENTRY_SUCCESS_ID_NO_WAITING;

fix return codes in wolfsentry_get_thread_deadline();

fix wolfsentry_get_deadline_rel() to handle WOLFSENTRY_DEADLINE_NOW and return positive rel_when when deadline is unexpired;

fix thread->deadline checks in lock functions to handle WOLFSENTRY_DEADLINE_NOW;

add unit tests for wolfsentry_set_deadline_rel(), wolfsentry_set_deadline_rel_usecs(), wolfsentry_get_deadline_rel(), wolfsentry_get_deadline_rel_usecs(), wolfsentry_clear_deadline(), wolfsentry_set_thread_readonly(), and wolfsentry_set_thread_readwrite().

src/json/centijson_sax.c: suppress false positive clang-analyzer-core.NullDereference from clang-20.0.0_pre20250118.

wolfsentry/wolfsentry_util.h: add macro MIN_SINT_OF().

refresh certs in examples/notification-demo/log_server/certs/ and examples/notification-demo/log_server/log_server.c.

refresh lwip patchset at upstream fbd597e450, adding "in *_filter_dispatch_*() implementations, move filter_reason_mask test to start, to minimize overhead."

Makefile.analyzers: in notification-demo-build-test recipe, if log_server launch fails, dump log_server.out before exiting.

tested with make check-all

[dgarske]

Wonderful! Even on MacOS all passed: